<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>propsData option</title>
    <script type="text/javascript" src="../assets/js/vue.js"></script>
</head>
<body>
    <h1>propsData option</h1>
    <hr>
    <header></header>

    <script type="text/javascript">
        var header_a=Vue.extend({
            template:`<p>{{message}}-{{a}}</p>`,
            data:function(){
                return{
                    message:'Hello , I am header!'
                }
            },
            props:['a']
        });
        new header_a({propsData:{a:12}}).$mount('header')
    </script>
</body>
</html>